WA crash paramedic opens his eyes

A paramedic left fighting for life after a head-on crash south of Perth has come out of sedation and opened his eyes, but it is not known if he will be fully mobile again.

Wesley Ackerman was seriously injured when the ambulance he was travelling in hit a dual-cab ute just before 5am on Monday in Oldbury.

The ambulance was on its way to a non-urgent job and carrying no patients.

St John Ambulance general manager of metro operations James Sherriff said the 33-year-old father of three had started communicating as sedation, which had helped him rest and heal from the trauma of the accident, was gradually reduced.

He was an extremely fit young man and making good progress but it was hard to say if he would make a full recovery, Mr Sherriff said.

Mr Ackerman was trapped in the wreckage for more than an hour, crushing his lower body, so it is not yet known whether he will regain full mobility.

On Tuesday, police charged a woman who allegedly sped through the crash scene about three-and-a-half hours after the collision, disturbing debris and forcing police officers to move out of the way to avoid being hit.

She allegedly went through road blocks and ignored instructions to stop.

When the 42-year-old was stopped in Fremantle later that day, police allegedly found illegal drugs in her car, which was impounded for 28 days.